If you were working with a protein that needed a certain pH to work, what would you need in the solution containing the protein?
a) salt
b) acid
c) buffer
d) carbon dioxide
Ans: c) buffer
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Which of the following is a milestone prokaryotic transcription initiation?
a. polymerase synthesizing mRNA in the 5’ to 3’ direction b. formation of a stable hairpin c. opening of the transcription bubble d. polymerase stalling in a region that is rich in A-T nucleotides
If a person is highly alert, anxious, and has loss
of fine motor control, what type of drug have they most likely taken?
a. a narcotic analgesic b. a stimulant c. a depressant d. a hallucinogen e. none of these
If four of the original colonists died before they produced offspring, the ratios of genotypes could be quite different in the subsequent generations. This would be an example of
A) diploidy. B) gene flow. C) genetic drift. D) disruptive selection. E) stabilizing selection.
The direct intake of a liquid, such as oil, into a cell is called
A. osmosis. B. phagocytosis. C. induction. D. pinocytosis.